Jar of drilling-tools.



UNITED STAZILESEATENT OFFICE.

ERASTUS L. CLEVELAND, OF SISTERSVILLE, WEST VIRGINIA, ASSIGNOR OF ONE-HALF TO ROBERT LESLIE LAMBERTON, OF SISTERSVILLE,

WEST VIRGINIA.

JAR OF DRILLING-TOOLS- Specification of Letters Patent.

Patented May 8, 1906.

To an whovn it may concern:

Be it known that I, ERASTUS L. CLEVE- LAND, a citizen of the United States of America, residing at Sistersville, in the county of Tyler and State of West Virginia, have invented certain new and useful Improvements in Jars of Drilling-Tools, of which the follow ing is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in jars of drilling-tools and the invention has for its primary object to provide a pair of jars which will be strong and durable and capable of withstanding the rough usage to which they are subjected.

My invention aims to increase the life of a pair of jars by constructing them whereby the weld of the jars will not be at the weakest point of the jarsfor instance, the reins thereof.

Heretofore it has been the practice in connecting the two parts of the jars together to weld the reins to the body portion of the jar, and by this practice considerable trouble has been experienced on account of the weakening of the reins of the jars. As the reins are of less area than the cap of the jars, a greater stress and strain is exerted upon the reins, and as the weld is made in the reins the weld is often broken or opened. To obviate these defects, I join the two arts of -the jars together above or below'the reins in that part commonly known as the cap, thereby adding greater rigidity to -the jars and providing a weld which cannot be readily broken or affected by the crystallization of the steel or metal from which the reins are made.

With the above and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts to be hereinafter more fully described, and specifically pointed out in the claim, and, referring to the drawings accompanying this application, like numerals of reference deslgnate' corresponding parts throughout the several views, in which Figure 1 1s a perspective view of a pair of jars. Fig. 2 is a perspective view of one of the links of the jars. Fig. 3 is a perspective View of an associate link, and Fig. 4 is a perspective view of a cap. I

In the accompanying drawings the reference-numeral 1 designates the upper part of a pair of jars, and the reference-numeral 2 the lower part of said jars, these parts being connected together by the reins 3 3 of the part 1 and the reins 4 4 of the part 2. In order that theparts 1 and 2 may be connected together, it has been the practice heretofore to connect the reins 3 3 to the body portion or cap 5 of the part 1, this connection be ing made by tapering the ends of the reins 3 3, as at 6 6, and providing the tapering recesses 7 7 in the body portion or cap 5 to receive the ends of the reins, said reins being welded therein. As the jars when used are inclined and subjected to the process of crystallization, the juncture of the reins with the body portion or cap 5 is affected and weakened, often causing the reins to separate from the body portion and incurring considerable trouble and expense in removing the body portion from a well. The reins are naturally the weakest point of the jars, and by connecting the reins to the body portion or cap of the jars in the manner described this point of the jars is further weakened.

My invention resides in entirely dispensing with connecting the reins to the body portion or cap and by making the weld in the body portion or cap 8 of the part 2 of thejars. This is accomplished by providing the part 8 with a wedge-shaped recess 9 to receivethe wedge-shaped tongues 9* 9 of the reins 4, said reins being further connected together by an arm or steel plate 10, inter osed between the tapering tongues 9 9 0 the reins and welded therein simultaneously with the operation of the welding of the reins in the wedge-shaped recess 9 of the cap 8.

The use of the jars and the many advantages of my improved construction will be apparent to those skilled in the art of welldrilling, and such changes in the details of construction as are permissible by the appended claim may be resorted to without departing from the spirit and scope of the invention.

What I claim, and desire to secure by Letters Patent, is

The combination With the upper part of a pair of jars of a cap and reins adapted to be 5 connected to the said upper part, said reins in'the presence of two Witnesses.

having tongue-shaped ends, a plate inter- ERASTUS L. CLEVELAND. posed between said ends, said cap having a Witnesses: Wedge-shaped recess formed therein, to re- J. C. WAY, ceive the tongues of said reins and said plate, G. L. LOWTHEH.

theends of the reins and the said plate being :0 Welded, Withthe said cap, into a solid mass, substantially as described In testimony whereof I afHX my signature 

